Oral B-Complex Vitamin (B6, B9 and B12) Prevents Low Anterior Resection Syndrome in Rectal Cancer Patients With Hyperhomocysteinemia
Oral B-Complex Vitamin (B6, B9 and B12) Supplementation for the Prevention of Low Anterior Resection Syndrome After Sphincter-Preserving Surgery in Rectal Cancer Patients With Hyperhomocysteinemia: A Randomized Controlled Trial
The goal of this clinical trial is to investigate if taking Oral B-Complex Vitamin (B6, B9 and B12) can help prevent low anterior resection syndrome (LARS) in rectal cancer patients with hyperhomocysteinemia after sphincter-preserving surgery for rectal cancer. LARS is a group of bowel problems that can occur after rectal cancer surgery, including frequent bowel movements, an urgent need to have a bowel movement, constipation, and loss of bowel control.
Our previous research suggests that hyperhomocysteinemia increased the occurrence of LARS. Folic acid, vitamin B6 and vitamin B12 are a safe, widely used way to treat hyperhomocysteinemia.
The main questions this study aims to answer are:
- Does taking Oral B-Complex Vitamin (B6, B9 and B12) lower the rate of LARS 6 months after surgery?
- How does this treatment affect internal anal sphincter (IAS) function?
Researchers will compare Oral B-Complex Vitamin (B6, B9 and B12) with a placebo (a look-alike tablet that contains no vitamins) to see if Oral B-Complex Vitamin (B6, B9 and B12) can help prevent LARS.
Participants will:
- Take B-Complex Vitamin (B6, B9 and B12) every day for 6 months
- Visit the clinic twice ( 3 months and 6 months after surgery) for checkups and tests
- Complete the LARS score questionnaire 6 months after surgery
Přehled studie
Postavení
Postavení
Podmínky
Podmínky
Intervence / Léčba
Intervence / Léčba
Detailní popis
Low anterior resection syndrome (LARS) is a cluster of bowel dysfunction symptoms after sphincter-preserving surgery for rectal cancer, including incontinence, urgency, and frequent bowel movements. The Chinese Expert Consensus on the Diagnosis and Treatment of LARS (2025 edition) reports an incidence of 69.8% at 3 months and 62.3% at 6-9 months after low anterior resection. LARS may persist for years and substantially impair quality of life. LARS is multifactorial, involving reduced rectal capacity and compliance, internal anal sphincter dysfunction and nerve injury. No drug or treatment is currently available to prevent LARS.
Hyperhomocysteinemia (HHcy) is defined as a serum homocysteine (Hcy) level above 15 μmol/L. The pooled prevalence of hyperhomocysteinemia (Hcy >15 μmol/L) in China was 25.9%. The prevalence of hyperhomocysteinemia is higher in cancer patients. Hyperhomocysteinemia increases the risk of various cardiovascular and cerebrovascular diseases, including coronary heart disease and stroke.
Our preliminary data showed that, in a single-center cohort of 530 patients who underwent low anterior resection for rectal cancer at Qilu Hospital of Shandong University between December 2023 and December 2025, hyperhomocysteinemia was present in 105 of 205 patients with LARS (51.2%) and in 95 of 325 patients without LARS (29.2%). This suggests hyperhomocysteinemia may be a risk factor of LARS.
In a Sprague-Dawley rat model of low anterior resection, hyperhomocysteinemia shortened colonic transit time and increased fecal water content. Postoperative supplementation with folic acid, vitamin B6 and vitamin B12 lowered serum Hcy and reversed these changes.
In our prospective single-arm pilot study, 80 patients who met the same eligibility criteria received Oral B-Complex Vitamin treatment. No adverse events were observed. After 6 months, majority of patients' Hcy levels returned to normal. LARS occurrence was much lower than 62.3%.
Typ studie
Typ studie
Zápis (Odhadovaný)
Zápis
Fáze
Fáze
- Nelze použít
Kontakty a umístění
Studijní kontakt
Studijní kontakt
- Jméno: Wei Guo, MD, PhD
- Telefonní číslo: +86 18560089725
- E-mail: guowei_182@126.com
Studijní záloha kontaktů
- Jméno: Hao Wu, MD, PhD
- Telefonní číslo: +86 18560086947
Studijní místa
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-
Shandong
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Jinan, Shandong, Čína, 250012
- Qilu Hospital of Shandong University
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Kritéria účasti
Kritéria způsobilosti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Popis
Inclusion Criteria:
- Aged 18 to 75 years
- Body mass index (BMI) of 18.5 to 28 kg/m2
- Low anterior resection performed for rectal cancer
- Serum homocysteine level between 15 and 50 μmol/L both before and after surgery
- No evidence of tumor recurrence or distant metastasis
- No short-term postoperative complications at the time of enrollment
- Able to resume oral intake after surgery
- Signed written informed consent
Exclusion Criteria:
- History of, or planned, neoadjuvant or adjuvant radiotherapy or chemotherapy
- Other severe chronic diseases, such as cardiovascular or cerebrovascular disease, diabetes mellitus or chronic respiratory disease
- Renal insufficiency, epilepsy, or other gastrointestinal diseases
- Hyperhomocysteinemia caused by inherited defects, such as cystathionine beta-synthase deficiency, methylenetetrahydrofolate reductase (MTHFR) deficiency or hereditary folate malabsorption, screened by detailed medical and family history; highly suspected cases will be referred for specialist diagnosis and excluded
- Participation in any other clinical study within the past 3 months
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Prevence
- Přidělení: Randomizované
- Intervenční model: Paralelní přiřazení
- Maskování: Čtyřnásobek
Počet zbraní
Zbraně a zásahy
Skupina účastníků / ArmSkupina účastníků / Arm |
Intervence / LéčbaIntervence / Léčba |
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Experimentální: Oral B-Complex Vitamin (B6, B9 and B12)
Participants will take Oral B-Complex Vitamin (B6, B9 and B12) tablets, one tablet orally twice daily, starting after resumption of oral intake following surgery. Serum homocysteine (Hcy) will be measured at 3 months after surgery: if Hcy remains above 15 μmol/L, the full dose will continue for another 3 months; if Hcy has returned to normal, the dose will be reduced to one tablet once daily.Treatment will continue until the 6-month postoperative visit. |
Film-coated oral tablet (0.3 g) registered as a health food in China (filing No. G201937000905), manufactured by Dongying Guangyuan Biotechnology Co., Ltd. Each tablet contains vitamin B6 (pyridoxine hydrochloride) 1.38 mg, folic acid (vitamin B9) 286 μg and vitamin B12 (cyanocobalamin) 3.05 μg. Excipients include corn starch, maltodextrin, microcrystalline cellulose, silicon dioxide, magnesium stearate, calcium carbonate and a film-coating premix. |
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Komparátor placeba: Placebo
Participants will take placebo tablets identical in appearance, color, odor and packaging to the Oral B-Complex Vitamin (B6, B9 and B12) tablets, one tablet orally twice daily, starting after resumption of oral intake following surgery. The same homocysteine-based dose-adjustment rules as in the experimental arm will apply, and treatment will continue until the 6-month postoperative visit. |
Oral placebo tablet (0.3 g) containing corn starch and maltodextrin, with no active vitamins, manufactured by Dongying Guangyuan Biotechnology Co., Ltd. under good manufacturing practice. The placebo tablets are identical in appearance, color, odor and packaging to the Oral B-Complex Vitamin (B6, B9 and B12) tablets. |
Co je měření studie?
Primární výstupní opatření
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Incidence of Low Anterior Resection Syndrome (LARS)
Časové okno: 6 months after surgery (3 months after stoma closure for participants whose protective stoma has not been closed by 6 months after surgery)
|
Proportion of participants with LARS, defined as a total score of 21 or higher on the LARS score questionnaire. The LARS score is a validated 5-item questionnaire on bowel function (Emmertsen and Laurberg, 2012), with a total score ranging from 0 to 42; higher scores indicate worse bowel function (0-20: no LARS; 21-29: minor LARS; 30-42: major LARS). |
6 months after surgery (3 months after stoma closure for participants whose protective stoma has not been closed by 6 months after surgery)
|
Sekundární výstupní opatření
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
LARS Score
Časové okno: 6 months after surgery (3 months after stoma closure for participants whose protective stoma has not been closed by 6 months after surgery)
|
Total LARS score (range 0-42; higher scores indicate worse bowel function), compared between groups as a continuous variable. |
6 months after surgery (3 months after stoma closure for participants whose protective stoma has not been closed by 6 months after surgery)
|
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Serum Homocysteine Concentration
Časové okno: Baseline (preoperative), and 3 and 6 months after surgery
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Serum homocysteine concentration (μmol/L). |
Baseline (preoperative), and 3 and 6 months after surgery
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Systolic Blood Pressure
Časové okno: 3 and 6 months after surgery
|
Systolic blood pressure (mmHg) measured in the seated position. |
3 and 6 months after surgery
|
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Diastolic Blood Pressure
Časové okno: 3 and 6 months after surgery
|
Diastolic blood pressure (mmHg) measured in the seated position. |
3 and 6 months after surgery
|
|
Anal Resting Pressure
Časové okno: 3 and 6 months after surgery
|
Anal resting pressure (mmHg) measured by anorectal manometry. |
3 and 6 months after surgery
|
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Maximum Anal Squeeze Pressure
Časové okno: 3 and 6 months after surgery
|
Maximum anal squeeze pressure (mmHg) measured by anorectal manometry. |
3 and 6 months after surgery
|
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Presence of Rectoanal Inhibitory Reflex
Časové okno: 3 and 6 months after surgery
|
Proportion of participants with a present rectoanal inhibitory reflex on anorectal manometry. |
3 and 6 months after surgery
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Spolupracovníci a vyšetřovatelé
Sponzor
Sponzor
Vyšetřovatelé
Vyšetřovatelé
- Vrchní vyšetřovatel: Wei Guo, MD, PhD, Qilu Hospital of Shandong University
Publikace a užitečné odkazy
Obecné publikace
- Collaboration HLT. Lowering blood homocysteine with folic acid based supplements: meta-analysis of randomised trials. Homocysteine Lowering Trialists' Collaboration. BMJ. 1998 Mar 21;316(7135):894-8.
- Emmertsen KJ, Laurberg S. Low anterior resection syndrome score: development and validation of a symptom-based scoring system for bowel dysfunction after low anterior resection for rectal cancer. Ann Surg. 2012 May;255(5):922-8. doi: 10.1097/SLA.0b013e31824f1c21.
- Esse R, Barroso M, Tavares de Almeida I, Castro R. The Contribution of Homocysteine Metabolism Disruption to Endothelial Dysfunction: State-of-the-Art. Int J Mol Sci. 2019 Feb 17;20(4):867. doi: 10.3390/ijms20040867.
- Bone Health and Nutrition Branch of Chinese Nutrition Society; Chinese Society of Parenteral and Enteral Nutrition; North Chronic Disease Prevention and Treatment Branch of Chinese Geriatric Society. Expert consensus on hyperhomocysteinemia. Electronic Journal of Metabolism and Nutrition of Cancer. 2020;7(3):283-288. doi:10.16689/j.cnki.cn11-9349/r.2020.03.007
- Kato I, Dnistrian AM, Schwartz M, Toniolo P, Koenig K, Shore RE, Akhmedkhanov A, Zeleniuch-Jacquotte A, Riboli E. Serum folate, homocysteine and colorectal cancer risk in women: a nested case-control study. Br J Cancer. 1999 Apr;79(11-12):1917-22. doi: 10.1038/sj.bjc.6690305.
- Seshadri S, Beiser A, Selhub J, Jacques PF, Rosenberg IH, D'Agostino RB, Wilson PW, Wolf PA. Plasma homocysteine as a risk factor for dementia and Alzheimer's disease. N Engl J Med. 2002 Feb 14;346(7):476-83. doi: 10.1056/NEJMoa011613.
- Selhub J. Homocysteine metabolism. Annu Rev Nutr. 1999;19:217-46. doi: 10.1146/annurev.nutr.19.1.217.
- Chinese Society of Coloproctology, Chinese Medical Doctor Association. Chinese expert consensus on the diagnosis and treatment of low anterior resection syndrome (2025 edition). China Journal of General Surgery. 2025;34(8):1603-1617. doi:10.7659/j.issn.1005-6947.250357
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Odhadovaný)
Začátek studia
Primární dokončení (Odhadovaný)
Primární dokončení
Dokončení studie (Odhadovaný)
Dokončení studie
Termíny zápisu do studia
První předloženo
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
První zveřejněno
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Poslední zveřejněná aktualizace
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
- Pooperační komplikace
- Patologické procesy
- Poruchy výživy
- Novotvary podle místa
- Novotvary
- Metabolismus, vrozené chyby
- Genetické choroby, vrozené
- Metabolické choroby
- Střevní nemoci
- Gastrointestinální novotvary
- Novotvary trávicího systému
- Nemoci trávicího systému
- Gastrointestinální onemocnění
- Kolorektální novotvary
- Střevní novotvary
- Rektální onemocnění
- Onemocnění tlustého střeva
- Malabsorpční syndromy
- Metabolismus aminokyselin, vrozené chyby
- Avitaminóza
- Nemoci z nedostatku
- Podvýživa
- Nedostatek vitaminu B
- Vrozené, dědičné a neonatální nemoci a abnormality
- Patologické stavy, příznaky a symptomy
- Nutriční a metabolické nemoci
- Syndrom nízké přední resekce
- Rektální novotvary
- Hyperhomocysteinémie
- Heterocyklické sloučeniny, 1 kruh
- Heterocyklické sloučeniny
- Heterocyklické sloučeniny, fúzované kroužek
- Azoly
- Polycyklické sloučeniny
- Heterocyklické sloučeniny, 4 nebo více prstenů
- Pyrroly
- Makrocyklické sloučeniny
- Tetrapyrroly
- Corrinoidy
- Vitamín B12
Další identifikační čísla studie
Další identifikační čísla studie
- KYLL-2026-04-037-1
Plán pro data jednotlivých účastníků (IPD)
Plánujete sdílet data jednotlivých účastníků (IPD)?
Popis plánu IPD
Individual participant data are subject to China's Regulations on the Management of Human Genetic Resources and will not be shared publicly. De-identified data supporting the published results may be made available upon reasonable request to the principal investigator, subject to approval by Qilu Hospital of Shandong University and compliance with applicable Chinese regulations.
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